Question : The most abundant element is
Option 1: Calcium
Option 2: Silicon
Option 3: Oxygen
Option 4: Nitrogen
Correct Answer: Oxygen
Solution : The correct option is Oxygen.
After hydrogen and helium, oxygen is the third most abundant element in the universe (by mass). It also makes up the most abundant element (by mass) in the Earth's crust, accounting for nearly half of the crust's mass. Around 89% of the world's oceans are made up of oxygen, and 20% of the atmosphere is made up of diatomic oxygen gas.
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Question : Identify an anomaly element that belongs to both Group 1 and Group 17.
Option 1: Oxygen
Option 2: Hydrogen
Option 3: Chlorine
Question : Ozone consists of which of the following?
Option 1: Oxygen only
Option 2: Oxygen and Nitrogen
Option 3: Hydrogen and Carbon
Option 4: Oxygen and Carbon
Question : From the given options, choose the one which is not a product of the decomposition reaction of Lead nitrate.
Option 1: Nitrogen dioxide
Option 2: Oxygen
Option 3: Nitrogen
Option 4: Lead oxide
Question : Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?
Option 1: Helium
Option 2: Nitrogen
Option 4: Hydrogen
Question : Select the option in which all the words are spelt correctly.
Option 1: Ritu is defecient in calcium.
Option 2: Ritu is deficient in calcium.
Option 3: Ritu is defisient in calcium.
Option 4: Ritu is daficient in calcium.
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